You selected Crataegus holmesiana var. chippewaensis (Sarg.) E.J.Palmer. This is a synonym for:

Accepted scientific name:
Crataegus fulleriana Sarg. (accepted name) 1 literature reference for Crataegus fulleriana Sarg.
Synonyms: -
Infraspecific taxon: Crataegus fulleriana var. chippewaensis (Sarg.) Kruschke
Crataegus fulleriana var. fulleriana
Crataegus fulleriana var. gigantea Kruschke
Crataegus fulleriana forma magniflora (Sarg.) Kruschke
Crataegus fulleriana var. magniflora (Sarg.) J.S.Pringle
Crataegus fulleriana var. miranda (Sarg.) Kruschke
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Rosales
Family Rosaceae
Genus Crataegus
Distribution: -
Additional data: -
Source database: IOPI-GPC, 10.0, Aug 2007
Latest taxonomic scrutiny: R. Pankhurst, 2009
Online resource: -
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:2b76b366-60a7-102d-be47-00304854f810:ac2010